three by three arrangement

The properties of the molecular and supramolecular crystals are determined, on the one hand, by the chemical structure of the molecules and, on the other, by the three-dimensional arrangement in the crystal lattice.

分子晶体及超分子晶体的宏观性质一方面由分子的结构决定，另一方面也和分子的排列方式有关。

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The paper takes Dongjiang Fourth Bridge in Huizhou city as an example for searching for the influence of Pre-stressed strand arrangement on the craze of box girder. By using great Finite-Element analysis ANSYS special part model of box girder have been built up through adopting three-dimensional body element.

为了探求预应力的布置对箱梁开裂的影响，以惠州市东江四桥为例，利用大型有限元程序ANSYS，采用三维体单元建立箱梁节段空间局部模型。

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Main equipments used were chosen. Design of three-dimensional arrangement was realized by a PDMS softer.

对工艺系统的主要设备进行了选型，并运用PDMS软件进行了三维布置设计。

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